Here's the project. I have eight audio tracks. Four from stage microphones and four from the orchestra. During scene changes, because the crew is very noisy, I would like to duck the stage mics and kick the orchestra mics.

I really don't want to individually adjust the volume envelopes of eight tracks.

It looks like I could do this with a volume envelope on a submix bus track, but how do I get the submix bus track on the timeline so that I can fine-tune my envelopes?